> Quick answer: Google has no dedicated before-and-after ad format. You design the composite image yourself and upload it as a standard image asset. It works in Responsive Display Ads, Uploaded Display Ads, and Performance Max campaigns.
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Side-by-side ads show the transformation. No long copy required. Google Display and Performance Max both support custom image assets, so before-and-after creatives fit naturally into either format.
Here is exactly how to build and upload one.
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What Are Side-by-Side (Before & After) Google Ads?
A side-by-side or before-and-after ad is a single image split into two panels. The left shows the problem. The right shows the result. The visual contrast does the persuasion work in under a second.
Google does not offer this as a native format. You design the composite, meet the file specs, and upload it like any other image asset. That image then runs across the Google Display Network or Performance Max placements.
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Why Before & After Ads Work on Google Display
Visual contrast reduces explanation
Showing a damaged surface next to a restored one communicates more than three lines of copy. The format compresses your promise into something people read at a glance. Research shows consumers rate products presented in before-and-after format as more capable than products shown in single-appeal ads.
Faster perception of value transformation
Users scan fast. Strong visual contrast stops attention in under a second. No supporting headline is needed to deliver the core message.
Works across product, service, and transformation categories
Beauty, home improvement, software interfaces, education. The principle holds across all of them. Show the gap between the current state and the desired state.
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Google Ad Formats That Support Side-by-Side Creatives
Responsive Display Ads (multiple image assets)
Per Google's Ads Help Center, Responsive Display Ads accept up to 15 images across three aspect ratios: horizontal, square, and vertical. Google automatically adjusts size and format to fit available placements. Upload your before-and-after composite as one of your image assets. It competes alongside other assets, and Google surfaces the best-performing combination.
Uploaded Display Ads (custom image dimensions)
Uploaded display ads give you full creative control. Standard sizes include 300x600 (half-page) and 970x90 (leaderboard). You design the exact composite and upload it as-is. No auto-adjustment. The before-and-after split appears exactly as you designed it.
Performance Max campaigns (image asset library)
Per Google Ads documentation, Performance Max campaigns require at least 7 image assets, including one 1200x1200 square image. Your before-and-after composition counts toward this asset library. Google then distributes it across Search, Display, YouTube, Discover, and Gmail placements automatically.
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How to Create a Side-by-Side Google Ad. Step-by-Step
Step 1. Design or generate your before & after image composition
Create a single image with a clear left-right or top-bottom split. Both panels must share identical framing, camera angle, lighting, and subject. Use the Coinis Before & After workflow to generate this composition from a product URL, or build it manually in any design tool.
Step 2. Ensure compliance with image requirements (5MB max, JPG/PNG)
Per Google Ads documentation, all image assets must be JPG or PNG format. The maximum file size is 5MB for display image assets. For uploaded banner ads, that cap drops to 150KB. Keep text overlays minimal in the image itself. Google Ads guidance explicitly states that images with little or no text perform better across the network.
Step 3. Choose your ad format and upload in Google Ads
In Google Ads, navigate to your campaign and open the asset section. Select Image and upload your file. For Responsive Display Ads, tag the image with the correct aspect ratio. For Performance Max, it goes straight into the asset group image library.
Step 4. Set your targeting, budget, and bidding
Choose audience segments, topic placements, or custom intent audiences. Set a daily budget and a bidding strategy aligned to your goal. Conversion-focused bidding works well when your landing page mirrors the transformation promise in the ad.
Step 5. Launch and monitor performance
Publish the campaign. After enough impressions accumulate, Google rates each asset as Low, Good, or Best. Pull under-performing before-and-after variants and replace them with new compositions to keep performance healthy.
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Design Best Practices for Side-by-Side Ads
Keep framing consistent between before and after shots
Same angle, same subject distance, same background location. Inconsistent framing breaks trust immediately.
Use clean contrast to highlight the transformation
High visual difference between panels drives attention. Low contrast gets scrolled past.
Minimize decorative clutter and text overlays
Per Google Ads best practices guidance, blank space in the image should not exceed 80% of the image area, and text in the image itself should be minimal. Clean images adapt better across placements.
Show real-world context, not sterile setups
A real bathroom looks more credible than a CGI render. Real context builds believability faster.
Preserve continuity (same subject, location, angle)
Consistency across both panels signals authenticity. It makes the transformation feel earned, not staged.
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Generating and Scaling Before & After Creatives Faster
Designing multiple before-and-after variants manually takes real time. Testing five different transformations across three aspect ratios multiplies that effort fast.
The Coinis Before & After workflow generates these compositions from a product URL. You get multiple ready-to-upload variants. The Image Ads workflow extends that coverage to full product image sets. Your Brand Profile keeps every variant consistent without extra setup on your end.
Coinis does not publish directly to Google Ads today. That support is on the roadmap. But the creative generation step, which is the most time-consuming part, is exactly where Coinis cuts the most work. Build your before-and-after assets in Coinis, then upload them to Google Ads in minutes.
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Or let Coinis do it.
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Frequently Asked Questions
Does Google Ads have a native before-and-after ad format?
No. Google does not offer a dedicated before-and-after format. You design the composite image yourself as a single JPG or PNG file, then upload it as a standard image asset in Responsive Display Ads, Uploaded Display Ads, or Performance Max campaigns.
What are the image file requirements for Google Display Ads?
Per Google Ads documentation, image assets must be JPG or PNG format with a maximum file size of 5MB. For uploaded banner ads, the file size cap is 150KB. Keep text overlays minimal in the image itself, as Google recommends images with little or no text for best performance across placements.
How many image assets should I upload to a Performance Max campaign?
Per Google Ads documentation, Performance Max campaigns require at least 7 image assets, including one 1200x1200 square image. Uploading more assets gives Google more combinations to test, which can improve overall campaign performance.
What makes a before-and-after ad credible rather than misleading?
Keep the framing consistent across both panels: same subject, same angle, same background. Show a realistic transformation, not an exaggerated one. Before-and-after claims must be truthful and substantiated. Staged or artificially enhanced transformations risk violating Google Ads policy.